There are some doubts about the origins of this cartoon (found at Scotteriology) – said to have been produced by the Jehovah’s Witnesses to explain their faith. The sword and fireballs are my favourite He-Man-esque scenes.
This serves alongside the South Park Mormon episode, and this other video, as a bit of a primer on the difference between these Cultic offshoots from Christianity and the rest of the flock.